Announcement-slide for stereopticons.



Patented Feb. 20, 1912.

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APPLICATION FILED SEPT. 16, 1911.

FIG 1.

//44IVSPAR/V7 ANNOUNCEMENT SLIDE FOR STEREOPTIUONS.

O. E. BATTBRSHALL F. L. OLESON.

WITNESSS UNITED STATES PATENT OFFICE.

CHARLES E. BATTERSHAIJ AND FRANK L. OLESON, OF CHICAGO, ILLINOIS.

AnnoUNoEMEn'r-smnr. r03 srnnnorrroons.

Specification of Letters Patent.

Patented Feb. 20, 1912.

Application filed September 16, 1911. Serial No. 649,628.

slides of the class employed in apparatusadapted for projection, such as stereopticons and magic lanterns, whereby announcements, pictures, or other'display matter is presented to view on screens, and it consists 1n certain peculiarities of the construction, novel arrangement and operation of the parts thereof, as will be hereinafter more fully set forth and specifically claimed.

Slides of the above named class, or for the aforesaid purpose, have heretofore generally been made of plates of glass of suitable size, on one of the surfaces of which, the pictures, announcements, or matter to be displa ed on the screen, were placed in any suitab e manner, but usually by photographic process or by hand, either of which operations is more or less expensive, tedious, and unsatisfactory After such plates were so prepared, another glass plate was secured .or placed on each of the surfaces on which the views were disposed to protectsaid views from being scratched, injured, or defaced.

By the above named old style construction of slidesand method of preparing the same it is apparent that many objectionable features are encountered,-viz; the plates being made of glass and of double thickness, or two plates, are easily broken, either in handling or when exposed to the heat of the projecting machine or instrument, andv besides are of such weight and so frangible as to render them unsuited as matter to be sent through the mails, and inconvenient for shipment in any suitable quantities, when otherwise transported. Furthermore, in all,

slides for projectors heretofore made, so far as we are aware, it has been necessary to place the view or display matter, on the slide before it, the said slide, is placed in the frame therefor, or when made of rigid glass plates, before they are secured together, which operation consumes much time, causes delay at inopportune moments and prevents the quick display of announcements in cases of emergency.

The object of the invention is to provide. a slide for" projecting apparatus which shall be made of such material and so constructed that the entire slide, consisting of a sheet or plate of transparent material and a frame, will be flexible, substantially non-breakable, and of very light weight as comparedwith slides heretofore made, thus permitting the announcements or display matter to be printed on transparent part of the slide by means of a typewriting machine or printing press,; without danger of injury to the slide, and after the slide is made up, 2'. 6., after'the transparent sheet or piece thereof hasbeen placed in its frame, for itis' apparent, that, as the frame is flexible as well as the transparent sheet, the entire slide may be placed in the typewriter or printing press, and will conform to the platen of the former and roller of the latter when such" is used, and that on account of the light weight and nonbreakable character of the material out of which the slide is made, the same can be transported by mail in considerable quantities, if so desired.

Another object of the invention is to so construct the parts of the slide that the transparent sheet thereof will be loosely or movably held by the frame, thereby permitting expansion and contraction of the sheet incident to the heat of the projecting apparatus without warping the frame or slide and thereby causing the projected view to be distorted as would occur if the frame and sheet were rigidly secured together. i

Another advantage attained by loosely mounting the sheet in the .frame, is to allow finished slides to be printed in a printing p ress1 without tearing or puncturing the materia Another object is to so make the slide that a single sheet only of transparent material is required, which arrangement allows the slide to be lettered=or printed on, after the same is completely made up, which cannot be done where two glass -or other kinds of transparent plates are used.

A further object is to make the slide of such material that the frame thereof will be practically non-heat absorbing so as to be safely and easily handled, without burning the fingers of the operator, and the transparent sheet of such material that it Wlll be. as

transparent as glass, so that the view will be clearly defined on the screen, but flexible to the end, that it will not crack by reason of describe it referring to the accompanying drawing in which- Figure 1 is a face view of a slide embodying our-invention, but showing one side only of the frame with the transparent sheet or plate located thereon. Fig. 2, is a similar view of a slide embodying the invention,

showing a portion of-the frame in its completed condition but a part thereof broken away to illustrate the movability of the transparent plate or sheet with respect to its frame. Fig. 3, is a sectional view taken on line 33, of Fig. 2, showing by dotted lines the flexibility of the entire slide, and Fig. 4, is-an enlarged sectional view of a portion of the slide showing the arrangement of the parts of the frame thereof so as to permit of tlie movement of the transparent sheet or p ate.

Like numerals of reference refer to corresponding parts throughout the different views of the drawing.

The reference numeral 5, designates one of the pieces of the frame of the slide, which piece is preferably made of cardboard and rectangular in shape as shown in the drawing, and is provided with an opening 6, through which the view or display matter on the transparent sheet may be projected. The other piece of the frame is designated by the numeral 7, and is of the same size and shape as the piece 5, and like the latter is provided with an opening 8,- for the same purpose as the opening 6, in the other piece of the frame. The pieces'5, and 7, of the frame, are located one on the other and are secured together at their perimeters by means of a strip of tape 9, which overlaps the edges of the pieces 5, and 7, of the frame, and may be secured thereto by means of paste or any suitable adhesive. By this arrangement it is apparent that the inner edges or perimeters of the pieces 5, and 7, of the frame will be free so as to loosely hold the transparent sheet 10, or plate. on which the view or other display matter for projection, may be placed by being printed thereon by means of a typewriter, printing press, or otherwise.

The transparent plate or sheet 10, may be made of any suitable flexible transparent material, but preferably of cellophane which is as transparent as glass, thin and flexible like paper, yet will not crack when aciaaec obvious that the transparent sheet or plate will have movement in all directions within the frame, and that when the frame and transparent sheet are subjected to heat, the

expansion and contraction of said arts will be. independent of each other so t at there will be no warping of the frame or transparent sheet to cause distortion of the pro jected view.

By reference to Fig. 4, of the drawing, it will be seen that the piece 7, of the frame,

is made of thinner material than the piece {5, so that the latter will act as a body or support for the flexible transparent sheet 10, while the piece 7, will act as a retainer or holder for the edges of said transparent sheet, but itwill be understood that the pieces 5. and 7, clamp the sheet 10, sufliciently to hold its edges straight and normally flat, yet will permit of free movement of the said sheet whenthe slide is placed in a typewriter or printing press for having the announcement or view printed thereon, which by reason of the flexibility of the parts of .the slide will ermit this to be done after the slide has en finished. As before stated, the pieces 5, and 7, as well as the tape or strip 9, are made of flexible material, the pieces 5, and 7, by preference being made of cardboard or fiber which is opaque-and to some extent non-heat-absorbing, while the strip 9, is preferably of cloth frame including two superposed flexiblepieces each having an opening and a flexible binder and the. outer edges of said pieces, and a transparent flexible sheet movably mounted between the frame pieces and extended across the openings therein, said pieces acting to normally hold the sheet flat,

but to allow of its movement independently of the frame.

CHARLES E. BATTERSHALL. FRANK L. OLESON. Witnesses:

Cams. C. TILLMAN, E. Nnwsrnom. 

